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  • 1
    Digitale Medien
    Digitale Medien
    Possible role of variant RNA transcripts in the regulation of epidermal growth factor receptor expression in human placenta (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 41 (1995), S. 149-156 
    Details
    ISSN: 1040-452X
    Schlagwort(e): Epidermal growth factor receptor ; EGFR ; Receptor regulation ; Alternate mRNA ; Placenta ; Life and Medical Sciences ; Cell & Developmental Biology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: Epidermal growth factor receptor (EGFR) plays an important role in growth and differentiation. The human placenta expresses high levels of the receptor. In the placenta, as in many other human tissues, EGFR is encoded by two RNA transcripts of 5.8 kb and 10.5 kb. The placenta also expresses a putative truncated EGFR transcript of 1.8 kb, which encodes only the ligand binding domain of the receptor. The etiology and role of these variant EGFR transcripts is unknown. Using the human placenta as a model to study this area, we report (1) the relationships among these transcripts suggest that the induction of alternate pathways of EGFR RNA processing is involved in their etiologies; (2) the 10.5 kb transcript may be the principal transcript involved in determining the level of the protein receptor; and (3) the isolation of a soluble protein with characteristics consistent with a translational product corresponding to the 1.8 kb transcript, which may act in regulating the activity of EGFR. Together these results suggest that alternate processing of EGFR RNA into variant transcripts may represent a novel mechanism involved in the regulation of the receptor protein. © 1995 Wiley-Liss, Inc.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrd.1080410205
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Identification and characterization of the KlCMD1 gene encoding Kluyveromyces lactis calmodulin (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 14 (1998), S. 869-875 
    Details
    ISSN: 0749-503X
    Schlagwort(e): calmodulin ; CMD1 ; ALG1 ; K. lactis ; EF hand ; Life and Medical Sciences ; Genetics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: The KlCMD1 gene was isolated from a Kluyveromyces lactis genomic library as a suppressor of the Saccharomyces cerevisiae temperature-sensitive mutant spc110-124, an allele previously shown to be suppressed by elevated copy number of the S. cerevisiae calmodulin gene CMD1. The KlCMD1 gene encodes a polypeptide which is 95% identical to S. cerevisiae calmodulin and 55% identical to calmodulin from Schizosaccharomyces pombe.Complementation of a S. cerevisiae cmd1 deletion mutant by KlCMD1 demonstrates that this gene encodes a functional calmodulin homologue. Multiple sequence alignment of calmodulins from yeast and multicellular eukaryotes shows that the K. lactis and S. cerevisiae calmodulins are considerably more closely related to each other than to other calmodulins, most of which have four functional Ca2+-binding EF hand domains. Thus like its S. cerevisiae counterpart Cmd1p, the KlCMD1 product is predicted to form only three Ca2+-binding motifs. The KlCMD1 sequence has been assigned Accession Number AJ002021 in the EMBL/GenBank database. © 1998 John Wiley & Sons, Ltd.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
  • 3
    Digitale Medien
    Digitale Medien
    Yeast Protein Serine/Threonine Phosphatases: Multiple Roles and Diverse Regulation (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 12 (1996), S. 1647-1675 
    Details
    ISSN: 0749-503X
    Schlagwort(e): yeast ; phosphorylation ; protein phosphatase ; PP1 ; PP2A ; PP2B ; calcineurin ; Sit4 ; Life and Medical Sciences ; Genetics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: Since the isolation of the first yeast protein phosphatase genes in 1989, much progress has been made in understanding this important group of proteins. Yeast contain genes encoding all the major types of protein phosphatase found in higher eukaryotes and the ability to use powerful genetic approaches will complement the wealth of biochemical information available from other systems. This review will summarize recent progress in understanding the structure, function and regulation of the PPP family of protein serine-threonine phosphatases, concentrating on the budding yeast Saccharomyces cerevisiae.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
  • 4
    Digitale Medien
    Digitale Medien
    A regulated MET3-GLC7 gene fusion provides evidence of a mitotic role for Saccharomyces cerevisiae protein phosphatase 1 (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 11 (1995), S. 747-759 
    Details
    ISSN: 0749-503X
    Schlagwort(e): Saccharomyces cerevisiae ; GLC7 ; protein phosphatase ; mitosis ; MET3 promoter ; Life and Medical Sciences ; Genetics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie
    Notizen: Saccharomyces cerevisiae possesses a single essential gene (GLC7) encoding protein phosphatase 1 (PP1). Elevated expression of this gene from the GAL1 promoter is highly detrimental to the cell, causing a growth defect and aberrant bud morphology, which leads to cells exhibiting long, extended buds. By comparison, expression of GLC7 from the weaker MET3 promoter was without significant effect on either growth or morphology. However, repression of GLC7 expression from the MET3 promoter in cells where the MET3-GLC7 fusion was the sole source of PP1 resulted in a mitotic delay. Such cultures showed a massive decrease in the rate of proliferation in conjunction with a significant increase in the proportion of large, budded cells. 4′,6-diamidino-2-phenylindole dihydrochloride (DAPI) staining and anti-tubulin immunofluorescence analysis of these cells revealed that many were blocked in mitosis, with a short spindle and DAPI-stained material stretched between the mother and daughter cell within the bud neck. These results support a role for PP1 in the completion of mitosis in S. cerevisiae.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/yea.320110806
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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